Note the big wings (as they were called) which are basically inch thick wood with sand inside of them to keep them inert. Their function was to make a "wall" between the front and the rear radiating speakers - which are out of phase with each other.
Designed to look cool by Cary Christie, their real function was to be able to properly launch the low frequency midbass from the EMIM midranges and prevent that out of phase energy from the rear from wrapping around too quickly and reducing output in this all important region.
There are certainly other ways to handle rear wave cancellation of a dipole, but this first classic speaker approach was a brute force wall that simply worked and defined the look of this loudspeaker for all time.
Truly form followed function in this classic.
Wings save the day
Note the big wings (as they were called) which are basically inch thick wood with sand inside of them to keep them inert. Their function was to make a "wall" between the front and the rear radiating speakers - which are out of phase with each other.
Designed to look cool by Cary Christie, their real function was to be able to properly launch the low frequency midbass from the EMIM midranges and prevent that out of phase energy from the rear from wrapping around too quickly and reducing output in this all important region.
There are certainly other ways to handle rear wave cancellation of a dipole, but this first classic speaker approach was a brute force wall that simply worked and defined the look of this loudspeaker for all time.
Truly form followed function in this classic.
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